NAD M3 V Vincent 236MKII any experiences??

Are there any warranties implied ?

Well if you look inside the units they are laid out differently and do use different
circuit boards etc.. So who knows WTF is going on over in China.. The problem is there is no control to who is making what. Dynaudio stopped selling raw drivers because people were making knock offs. So not sure what to think here, regardless the reviews on the unit are good and the Vincent gear seems hard to get especially the 236MK II.

I still think some of the best stuff is designed in the UK and US/Canada, Japan and Taiwan.

I've listened to the Vincent extensively and was very impressed--its huge advantage, of course being the tube preamp stage. Really, really nice balance and detail. I've also heard the NAD M series amps, albeit briefly, and recall thinking that they weren't significantly better than NAD's less pricey mass-market amps.
As for the whole China debate, it seems that globalization has taken such hold of the audio industry that it's becoming very difficult to ascertain precisely where gear is assembled or where components are sourced (I've read, for example, of differently-branded high end amplifiers with almost identical Chinese-made guts varying in price by as much as 300%). To reiterate others' advice, if you like how a well-reviewed piece sounds, buy it irrespective of where it was screwed together.

Is Vincent even still in business? I can no longer get to their web page.

The Vincent web site worked just fine for me. I bought a pair of their top of the line hybrid monoblocks earlier this year and I think they are fantastic amps. Have never heard the 236MKII so can't comment on it.